A non-transitory, computer readable storage medium containing a computer program, which when executed by a computer, causes the computer to carry out actions, comprising:
- acquiring data on an original whole-sky picture for use in display and tag data indicating a position of a particular subject in the original picture;
- acquiring a display-time viewpoint and a display-time visual line with respect to the original picture;
- generating, from the original picture, a display picture in a visual field based on the display-time viewpoint and the display-time visual line;
- and
- outputting data on the display picture to a display device,
- wherein generating the display picture involves performing, in a state where a predetermined condition is satisfied, processing for including the position in the original picture indicated by the tag into the visual field, by referring to the tag data.